CCMA: Specimen Collection

As a medical assistant, you need to recognize that a normal fasting blood glucose ranges from 70 to 99 mg/dL. A result of 45 mg/dL is a critical hypoglycemic value, especially when paired with symptoms like dizziness and sweating. You must notify the provider immediately so they can initiate rapid treatment, making the first option the only safe choice. Simply documenting the result delays necessary emergency care. Repeating the test wastes valuable time when the patient is already showing clear physical signs that match the low reading. Finally, advising the patient to drink water and rest is incorrect because water does not contain the fastacting carbohydrates required to elevate their blood sugar, and delaying medical intervention could lead to a loss of consciousness or seizures.

The presence of a productive cough with rust-colored sputum combined with sharp chest pain when inhaling deeply and a high fever points directly to bacterial pneumonia. Preparing for a chest radiograph is the correct action to confirm lung consolidation. Routine spirometry (Option A) and peak flow measurements (Option D) are used to evaluate obstructive diseases like asthma or COPD and are generally contraindicated during acute respiratory infections. Demonstrating a rescue inhaler (Option C) addresses bronchospasm seen in asthma, not the acute infectious consolidation occurring in this patient's right lower lobe.

Proper external database logging requires the assistant to verify patient identifiers on the physical specimen tubes against the electronic requisition before releasing them to the courier. Reprinting the requisition to match a misspelled name on a tube is incorrect; the tube must be redrawn or corrected according to strict facility protocol, not altered to match an error. Discarding the electronic requisition for a handwritten note is incorrect because reference labs require standardized electronic orders for processing. Changing test codes to match drawn tubes is incorrect and constitutes practicing outside the scope of practice.

Light blue tubes containing sodium citrate are highly sensitive to handling. They require only 3 to 4 inversions to adequately mix the anticoagulant with the blood. Inverting the tube ten times is considered excessive mixing for this specific additive and can prematurely activate platelets and the clotting cascade, which artificially shortens coagulation test results. Option A is incorrect because over-mixing compromises the accuracy of coagulation tests. Option B is incorrect because ten inversions is too many, not inadequate; under-mixing would cause microclots. Option D is incorrect because while prolonged handling can eventually degrade cells, the immediate and specific risk of over-inverting a sodium citrate tube is the alteration of the coagulation factors being tested.

Drawing blood from an arm with an active intravenous line requires careful site selection to avoid contaminating the sample. The correct answer is B because drawing blood proximal to an active IV means the collected sample will be heavily diluted by the saline fluid infusing into the vein, rendering the test results inaccurate. Option A is incorrect because hemoconcentration is caused by leaving a tourniquet on too long, not by IV fluid mixing. Option C is wrong because clotting is related to inadequate tube inversion or a difficult draw, not the presence of intravenous fluids. Option D is incorrect because hemolysis is caused by mechanical trauma to the red blood cells, such as using too small of a needle or shaking the tube vigorously, rather than fluid dilution.